Most recent hard disks do include S.M.A.R.T. support. You might find interesting to read the "What is S.M.A.R.T. and how can we use it to avoid data disaster?" article. S.M.A.R.T. can even report the temperature for your hard disk. If your disk controller, and its related drivers, allow it, SpeedFan can almost always access and report reliability data from any hard disk manufactured since 1995.
SpeedFan properly accesses the temperature sensor available in the following hard disks:

Manufacturers EXCELSTOR    17 FUJITSU    122 HITACHI    189 HP Compaq    3 IBM    53 MAXTOR    163 MDT    14 SAMSUNG    135 SEAGATE    297 SILICON IMAGE    1 TOSHIBA    67 WESTERN DIGITAL    1026

Hard disks from EXCELSTOR that include a temperature sensor Manufacturer Model Size Notes EXCELSTOR EXCELSTOR TECHNOLOGY J240 40.2GB EXCELSTOR EXCELSTOR TECHNOLOGY J340 41.2GB EXCELSTOR EXCELSTOR TECHNOLOGY J360 61.5GB EXCELSTOR EXCELSTOR TECHNOLOGY J640 41.2GB EXCELSTOR EXCELSTOR TECHNOLOGY J660 58.6GB EXCELSTOR EXCELSTOR TECHNOLOGY J680 82.3GB EXCELSTOR EXCELSTOR TECHNOLOGY J680S 82.3GB EXCELSTOR EXCELSTOR TECHNOLOGY J8080 82.3GB EXCELSTOR EXCELSTOR TECHNOLOGY J8080S 82.3GB EXCELSTOR EXCELSTOR TECHNOLOGY J8160 165GB EXCELSTOR EXCELSTOR TECHNOLOGY J8160S 165GB EXCELSTOR EXCELSTOR TECHNOLOGY J840 41.2GB EXCELSTOR EXCELSTOR TECHNOLOGY J860 61.5GB EXCELSTOR EXCELSTOR TECHNOLOGY J880 82.3GB EXCELSTOR EXCELSTOR TECHNOLOGY J880S 82.3GB EXCELSTOR EXCELSTOR TECHNOLOGY J9250 250GB EXCELSTOR EXCELSTOR TECHNOLOGY J9250S 250GB There are 17 HARD DISKs listed here.